• 文献标题:   Strain engineering for mechanical properties in graphene nanoribbons revisited: The warping edge effect
  • 文献类型:   Article
  • 作  者:   JIANG JW
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF APPLIED PHYSICS
  • ISSN:   0021-8979 EI 1089-7550
  • 通讯作者地址:   Shanghai Univ
  • 被引频次:   3
  • DOI:   10.1063/1.4954019
  • 出版年:   2016

▎ 摘  要

We investigate the strain engineering and the edge effect for mechanical properties in graphene nanoribbons. The free edges of the graphene nanoribbons are warped due to compressive edge stresses. There is a structural transformation for the free edges from the three-dimensional warping configuration to the two-dimensional planar structure at the critical strain epsilon(c) = 0.7%, at which the applied mechanical stress is equal to the intrinsic compressive edge stress. This structural transformation leads to step-like changes in several mechanical properties studied in the present work, including the Young's modulus, the Poisson's ratio, the quality factor of nanomechanical resonators, and the phonon edge mode. Published by AIP Publishing.